URL

URL stands for Uniform Resource Locator. Address of resource or file on the internets is called Uniform Resource Locator (URL). Uniform Resource Locator consists of protocol of the resource, domain name for the resource and address of the file. Uniform Resource Locator is the combination of this Starting point URL's. Starting point URL connects the browsers to the resources and has four types. Static URL, Dynamic URL, Directory URL, Formula URL.



URL that connects the destination without generating programming Scripts is called Static URLs. The URL that uses the programming script to connect to the destination is called dynamic URL. Directory URL has no file name that points the default file of the directory. The URL that may be static or dynamic and required the structure to specify the format and that structure must be used to connect to a destination. 
There are different types of URLs; http/https( Hypertext Transfer Protocol. ), file/ftp (Local files and FTP archives), info (Emacs `Info' pages), mailto (Sending email )....here is the video which gives basic idea